Function sys_mq_unlink

components/lwp/lwp_syscall.c:9122–9148

* @brief Remove a message queue. * * This function removes a message queue identified by its name. If the message queue * is open by any process, it will be removed only when all the processes close their * file descriptors associated with the message queue. * * @param[in] name The name of the message queue to be removed. It should be a null-terminated * string that conforms

 *       open by other processes.
 */
sysret_t sys_mq_unlink(const char *name)
{
    int ret = 0;
#ifdef ARCH_MM_MMU
    char *kname = RT_NULL;
    rt_size_t len = 0;

    len = lwp_user_strlen(name);
    if (!len)
        return -EINVAL;
    kname = (char *)kmem_get(len + 1);
    if (!kname)
        return -ENOMEM;

    lwp_get_from_user(kname, (void *)name, len + 1);
    ret = mq_unlink(kname);
    if (ret < 0)
    {
        ret = GET_ERRNO();
    }
    kmem_put(kname);
    return ret;
#else
    ret = mq_unlink(name);
    return (ret < 0 ? GET_ERRNO() : ret);
#endif
}

/**
 * @brief Send a message to a message queue with a timeout.